Browsing by Author "Dawit Getachew"

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    Diagnostic Accuracy of Core Needle Biopsy of Primary Bone and Soft Tissue Tumors With Reference to Final Resection Histopathology at Tikur Anbessa Specialized Hospital. a Retrospective Cross Sectional Study
    (Addis Ababa University, 2024-10-23) Dawit Getachew; Ermias Gizaw
    Background: Biopsy plays a crucial role in diagnosing musculoskeletal tumors. While open biopsy is traditionally seen as the gold standard, recent literature indicates that percutaneous core needle biopsy yields comparable results while offering benefits such as being less invasive, having fewer complications, and being faster and more cost-effective. This study aims to evaluate and compare the diagnostic accuracy and effectiveness of core needle biopsy against final surgical resection in musculoskeletal lesions. Methods: This retrospective cross-sectional study, conducted from April 2022 to June 2024, identified and enrolled patients with primary bone or soft tissue tumors who underwent core needle biopsy (CNB) followed by tumor resection at the Orthopedics Department of Tikur Anbessa Specialized Hospital. The CNB results were evaluated for sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and diagnostic accuracy. RESULTS: A total of 87 patients were identified and enrolled in this study. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and diagnostic accuracy of the core needle biopsy (CNB) were 90%, 94.6%, 95.7%, and 87.5%, respectively. The overall diagnostic accuracy of CNB was 93.1%. A specific diagnosis was achieved in 80% of the cases (67 out of 87), and no complications were reported associated with the CNB procedure Conclusion: Core needle biopsy is a reliable technique for differentiating benign and malignant as well as obtaining the final diagnosis of primary bone and soft tissue tumors, with a lower risk of complications. It may be confidently integrated into clinical practice as a substitute for the open incisional biopsy method.
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    The Effect of Organizational Structure on Entrepreneurial Orientation: The Mediating Role of Organizational Culture in the Basic Metals Industry of Ethiopia
    (A.A.U, 2020-07) Dawit Getachew; Ethiopia Legesse
    The Study examines the Effect of Organizational structure on Entrepreneurial Orientation with the mediating role of Organizational Culture in the Basic Metals Industry of Ethiopia. The research used Organizational theory to evaluate its effect on Entrepreneurial Orientation and in doing so it integrates Organizational Culture to investigate its mediating role robustly. Primary data were used on 19 Basic Metals manufacturing companies to solicit response of 95 respondents. Out of questionnaires that have been distributed, all were usable. An exploratory factor analysis was conducted and structural equation modeling techniques that fulfills measurement construct validity and reliability through AMOS, version 23 software was used. The Result showed OS has a statistically significant negative effect on EO. However, the mediating variable OC have no mediation role between OS and EO. Similarly, Centralization and Formalization individually does not exhibit a significant effect on EO. In terms of testing second order variables, the result indicates that out of three variables that make out OS construct complexity and formalization have significant positive association with second order variable OS. Likewise, autonomy and innovativeness are first order variables and have significant positive association with second order variable EO. This study suggests the importance for rethinking and reviewing the current organizational structure. Also, since the companies rely on employees for their mass production, employees need to be regularly updated and build their capacity on regular bases that would address the strategic orientation elements gap
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    The Relationship between Indirect Tax and Economic Growth in Ethiopia
    (Addis Ababa University, 2018-02) Dawit Getachew; Habtamu Berhanu
    The main objectives of this study was to examine the relationship between Indirect tax and Economic growth in Ethiopia in order to make a one step contribution to the existing literature, especially in Ethiopia where there is no empirical study on the topic. The study used quantitative research approach. To this end, secondary data was collected from Ministry of finance and Economic Development, National Bank of Ethiopia and Ethiopian Revenue and Customs Authority for the period 2002 to 2016.The researcher also used relevant websites and annual bulletins for the study. The data was summarized and analyzed using descriptive and multiple regressions models in order to answer the objective of the study. The empirical results showed that Value added tax has a positive significant relationship with RGDP at 1% and Custom duty has a negative significant relationship with RGDP at 5% confidence interval while Excise tax and Turnover tax have no significant relationship with RGDP. From the findings the researcher recommended that Ethiopian Revenue and Custom Authority should improve its efficiency in collecting tax revenue.